perspective distortion

I was reading a forum post by someone, who said, "I prefer prime lenses, and would rather zoom with my feet." I also read a blog post by someone that was comparing lenses of two different focal lengths, and they said, "If I want a wider angle, I'll just back up." Now, of course we've heard these references to "zooming with our feet" for years, but does it really work? We'll explore that in today's blog post.